package com.yc.thread;

public class Test1_SingleThread {
    public static void main(String[] args) throws InterruptedException {
        System.out.println(" main开头 ");
        show();
        System.out.println(" main结束 ");
    }

    //系统性能的瓶颈，耗时，假死，阻塞
    public static void show() throws InterruptedException{
        Thread.sleep(5000);
        System.out.println("aaa");
    }
}
